Predaplant Ambulomelides is literally a custom card. Being able to search a Predaplant monster or Predap Spell/Trap on Fusion Summon and being able to Tribute a Predaplant to Special Summon a Predaplant from Deck is so incredibly powerful. And in the case of this Deck, it, alongside Ultra Polymerization and Predaplant Ophrys Scorpio, gets you to Predaplant Triphyoverutum through a single card and a monster discard. From there, if you have World Legacy Monstrosity in hand, you can target Triphy to get Prediction Princess Bibliomuse and Deus-X Krawler (or Trias Hierarchia) from Deck, overlaying Triphy and Deus into the Aggregator line. Or, if you have enough Ritual fodder in hand or once you have enough after activating Pot of Prosperity, you can go into Tarotrei and play with whatever Flips you have on hand while having an Extra Deck Special Summon negate through Triphy. I really like how this Deck came out, and it even shares the core components of Master of Ham Prediction Princess, which is a Deck that I have continuously said that I really like, especially for a Prediction Princess variant. Instead of searching Ultra Poly with Predaplant Darlingtonia Cobra, you can search for Instant Fusion, Link into Cross-Sheep, Instant Fusion into Master of Ham to one of Cross-Sheep's Zones, Summon Bibliomuse from Deck, Summon a Level 4 or lower back from GY with Cross-Sheep, and have material for Apollousa with Bibliomuse access on hand, just like you would in Ham Prediction Princess. This Deck takes everything from Ham Prediction Princess and adds on to it, making it, in my opinion, a more interesting and more fun Deck to play.
For the Main Deck monsters: 3 Prediction Princess Tarotrei and 1 Prediction Princess Tarotreith. Tarotrei can Quick Effect flip a monster face-up or face-down and can Special Summon a Flip Monster face-down during the End Phase from hand or GY. Tarotreith can either be Ritual Summoned or Special Summoned via Tarotrei's End Phase effect. It can Quick Effect flip any number of your monsters face-up or face-down and on flip, it can Special Summon a Flip Monster from Deck face-down. 3 Prediction Princess Bibliomuse this card can Summon itself back face-down if it is Tributed and sent to the GY, and if it is flipped face-up, it can search for a Prediction Princess, other than itself, and a Ritual Spell from Deck. And while it is face-up on field, your Ritual Monsters gain targeting and destruction protection from your opponent's effects. 2 Deus-X Krawler which negates the activated effects of all monsters on your opponent’s side of the field after it has been flipped face-up and it can add a Level 9 monster with a different Type and Attribute than itself if it is destroyed on field. 1 Trias Hierarchia which can be sent off of Diviner or Special Summoned off of the effect of World Legacy Monstrosity targeting Predaplant Triphyoverutum on the field and Hierarchia can also Tribute a Fairy to Summon itself from hand or GY. 1 Mardel, Generaider Boss of Light which is a Level 9 LIGHT Plant monster which means that Monstrosity can Special Summon it from Deck when targeting Triphyoverutum on field. On Normal or Special Summon, you can add a Generaider card or a Plant monster from your Deck to your hand. Since we are playing Lonefire, you can get this card out of the Deck with it, and if you have Monstrosity in hand, you can target it to get Bibliomuse and Deus-X out of the Deck to have both Bibliomuse access and Rank 9 access. You could play Impcantation Talismandra instead of Mardel because it is also a Plant that Lonefire can get and it searches for a Ritual Monster when Special Summoned from Deck. But I still like Mardel better as it is a Level 9 target for Monstrosity both on field and in Deck. 3 Predaplant Ophrys Scorpio, 1 Predaplant Darlingtonia Cobra, and 2 Predaplant Chlamydosundew. Scorpio can discard a monster on Normal or Special Summon to Special Summon a Predaplant Monster from Deck. You are always Special Summoning Cobra with this effect as Cobra searches for a Fusion or Polymerization Spell from Deck when it is Special Summoned by the effect of a Predaplant monster once per Duel. Your options in this Deck are Ultra Polymerization and Instant Fusion. If you want to go through the Master of Ham line because you have the Ritual pieces already assembled in hand, you search for Instant Fusion. If you have Monstrosity, you search Ultra Poly to Fuse into Predaplant Ambulomelides and go forth from there. Chlamydosundew on field can Fusion Summon a DARK Fusion Monster from Extra Deck by using monsters from your hand, field, and/or monsters your opponent controls with Predator Counters as Fusion Material including itself. After you Ultra Poly Scorpio and Cobra into Melides, Melides searches for a copy of Predapruning which I will talk about later on, but you would then use the effect of Ultra Poly in GY, banishing it to Special Summon both Scorpio and Cobra from GY as they were used as Material for the Fusion Summon by Ultra Poly. Melides would then Tribute any Predaplant monster to Special Summon Chlamy from Deck. Now that you have 3 DARK monsters on field, you can now Fuse using Chlamy’s effect to Fusion Summon Predaplant Triphyoverutum. 3 Diviner of the Herald which can send a Fairy monster from Deck or Extra Deck to GY on Normal or Special Summon. 2 Lonefire Blossom which can Tribute a Plant to Special Summon a Plant from Deck. And 3 Ash Blossom & Joyous Spring.
Spell/Traps: 1 Instant Fusion for Master of Ham or Predaplant Ambulomelides which is definitely a Summonable target. I haven’t experimented much with Instant Fusioning into Melides in this Deck, but presumably, if you already have Bibliomuse access, you could go into Melides and see if you have any plays from there. 1 Ultra Polymerization which Fusion Summons using exactly 2 monsters you control by paying 2000 Life Points. Neither player can activate cards or effects in response to the activation. You can banish this card from GY to target a Fusion Monster that was Fusion Summoned via this card’s effect and Special Summon all the Fusion Materials used to make it from your GY with their effect negated and ATK/DEF reduced to 0. 1 Predapruning which is an Equip Spell that targets and Special Summons a Predaplant monster from your GY and equips it with this card. This can Special Summon any Predaplant monster, including Predaplant Triphyoverutum. So, after Triphy ends up in the GY, you can Special Summon it back with Predapruning to use as material for a Rank 9 play, to go into Laevateinn, Generaider Boss of Shadows or to use as more Link Material. 3 Underworld Ritual of Prediction which can Ritual Summon a Prediction Princess Ritual Monster from hand or GY face-up or face-down and you can banish it from GY during the Standby Phase to Special Summon a non-Ritual Prediction Princess monster from Deck face-down. 3 World Legacy Monstrosity which can either Special Summon 1 Level 9 monster from hand or target a Level 9 you control and Special Summon 2 Level 9 monsters with a different Type and Attribute than the targeted monster with different names. 3 Pot of Prosperity. 3 Infinite Impermanence.
Extra Deck: 1 Predaplant Triphyoverutum which requires 3 DARK monsters on field as Fusion material and if your opponent would Special Summon a monster(s) from the Extra Deck while you control this Fusion Summoned card, you can negate the Summon and destroy those monsters. We are mainly getting Triphy out for a Level 9 on field for Monstrosity, but you could use it as interruption if you already have all of your Ritual pieces in hand. And it is important to note that Triphy cannot negate Extra Deck Special Summons after it has been brought back by Predapruning. Best that it can do at that point is be used for a Rank 9 or as Link Material. 1 Predaplant Ambulomelides which needs 2 Predaplant monsters as Fusion Material and on Fusion Summon, it can add a Predaplant Monster or a Predap Spell/Trap from Deck to hand which is always going to be Predapruning unless you’ve already drawn it, otherwise you can add anything. It can also target 1 monster you control or 1 monster your opponent controls with a Predator Counter and Tribute it to Special Summon a Predaplant monster from Deck. You are always getting Chlamy with this effect for the ability to Fusion Summon again. 1 Starving Venom Fusion Dragon, 1 Garura, Wings of Resonant Life, and 1 Mudragon of the Swamp which are Super Poly targets. 1 Master of Ham which Special Summons a Flip Monster from Deck face-down on Fusion Summon. 1 Herald of the Arc Light which searches a Ritual Monster or Ritual Spell when sent to GY. You can definitely play 2 in case you draw Diviner and Trias Hierarchia, so you could cut 1 of your Super Poly Targets for the second Herald. 1 Mereologic Aggregator, 1 Laevateinn, Generaider Boss of Shadows, and 1 Jormungandr, Generaider Boss of Eternity. 1 Apollousa, Bow of the Goddess. 1 Cross-Sheep. 1 S:P Little Knight. 1 I:P Masquerena. 1 Gravity Controller.
Side Deck: 2 Nibiru, the Primal Being. 1 Kurikara Divincarnate. 3 Super Polymerization. 3 Triple Tactics Thrust. 1 Triple Tactics Talent. 2 Dark Ruler No More. 1 Change of Heart. 2 Evenly Matched.